Originally Posted by Jmaczx4st
If Im not mistaken you can get the 2.5 head off a Fusion some minor mods and it should bolt up. I think Tom was toying with it haven't been on in awhile so not sure if it was completed.
All I know is that I have a 2.3 with Cossie CAI, Borla exhaust with HFC, and a 91 oct tune and there isn't a 2.0 anywhere near me that stands a chance.
I'm playing with a 2.5 from Fusion, planning to swap it in january/feb.
The 2.5 head has an extra oil passage that the 2.0 block don't have. This oil passage feeds the VCT device and the first journal of the intake cam (close to VCT).
The 2.0 block don't have this oil passage, so we have to find a way to feed this oil passage for 2.5 head, you can't ignore it because it feeds the first journal of intake cam.
I'm planning to swap the 2.5 block, so I think I'll not spend time trying the 2.5 head with 2.0 block.